A properly fitting and well maintained denture will benefit people who's teeth can longer be saved or maintained.

"Dentures last forever!"

Dentures are long lasting but like anything man made do wear out. They are made from plastic and dropping them can cause them to break. Depending on the individual the teeth wear out and the mouth changes. 

"Once you have dentures, you don't need to see a dentist anymore."

The mouth changes constantly. Dentures that become loose and do not fit as well as they should will require a reline. People with dentures can still develop oral cancer and should be examined regularly by a dentist. If your dentures become loose you may need to see the dentist for a reline. 

"Everyone can tell when you're wearing dentures."

Well fitting dentures made with meticulous care and attention to detail are difficult to recognize as dentures. They should provide a natural appearance and function well. You should be able to eat and speak normally. Dentures that fit well should not require adhesives to hold them in place.